What options are there for good quality lip spoilers that can be installed and later removed without causing any damage to the stock bumper? I really like the Nismo lip, but it requires the drilling of multiple holes in the face of the bumper.

What lip spoilers are reversable bolt-ons? Pictures and installation comments much appreciated.

 

I have the C-West lip...it's screwed on in the front fenderwells. It's so tight and perfect-fitting you don't even need screws.

but all lips will make a mark on your front bumper where it touches the bumper. That's inevitable.

 

They make a mark, good point, I hadn't thought of that. Maybe the 3M paint film on my front bumper might provide some protection against that.
Got any pictures of your installation?